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Mdm Member Since: 11 Sep 2013 Location: Sunny Lancashire Posts: 1688 ![]() ![]() |
for clarity. do you have a standard battery for the car and a split charge to run the agm?
are they both same size and spec and agm ones? if they are the same then you can join them together minus the split charge without much issue. if not then its not recommended. agm need a certain input of amps and type of battery charger to get the best out of them. lithium need a different charger set up as well. without the lithium spec its hard to know what it will power and more so what you plan to run off it for how long. i would have thought that 1 good battery would replace the agm with no problems. you could also consider a larger spec std alternator and or a 2nd one , (gwyn lewis does a nice kit) sole use to power the aux battery system, this could be 100=140 amp spec as well. |
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jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8476 ![]() ![]() ![]() |
If the main aim is extra camping current then don't parallel the first two as then only lithium for camping.
As mdm says ideally 2 different chargers needed for agm and lithium compared to std. Personally I am running 1750agm as main battery and then 2 x 105ah leasure batteries on split charge for camping. .plus solar controller for leisure Cheers James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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west4x4 Member Since: 23 Jan 2010 Location: Rutland Posts: 147 ![]() ![]() |
Current batteries are 2 identical 120ah AGMs with a T-Maxx split charge. Powers 2 auxiliary fuse boxes one under drivers seat powering CB and some cabin lights. One in rear running a Snomaster fridge freezer plus some more lighting. Lithium is 300AH (yes I know it’s overkil) be getting a DC-DC charger for it with some provision for solar. Adding a diesel heater and perhaps looking to run and induction hob instead of gas. Upgraded alternator has been considered didn’t think about a second one I will investigate that. |
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